1225747957 has 16 divisors (see below), whose sum is σ = 1485146880. Its totient is φ = 987579648.

The previous prime is 1225747933. The next prime is 1225747973. The reversal of 1225747957 is 7597475221.

It is a cyclic number.

It is not a de Polignac number, because 1225747957 - 2¹⁹ = 1225223669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1225747957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225747927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93703 + ... + 105979.

It is an arithmetic number, because the mean of its divisors is an integer number (92821680).

Almost surely, 2^1225747957 is an apocalyptic number.

1225747957 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1225747957 is a deficient number, since it is larger than the sum of its proper divisors (259398923).

1225747957 is a wasteful number, since it uses less digits than its factorization.

1225747957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13140.

The product of its digits is 1234800, while the sum is 49.

The square root of 1225747957 is about 35010.6834694783. The cubic root of 1225747957 is about 1070.2052062246.

The spelling of 1225747957 in words is "one billion, two hundred twenty-five million, seven hundred forty-seven thousand, nine hundred fifty-seven".